Practice Force and Laws of Motion RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Physics question set covers important concepts related to force, Newton’s laws of motion, inertia, acceleration, momentum and the effect of force on the motion of objects.
The Force and Laws of Motion RRB PYQ collection is useful for candidates preparing for Railway examinations and revising important Physics concepts through previous year questions. Questions from this topic can include both conceptual and numerical problems, helping you understand the application of Newton’s laws and improve your problem-solving skills.
Whether you are preparing for RRB NTPC Force and Laws of Motion PYQ, RRB Group D Force and Laws of Motion PYQ, RRB JE Force and Laws of Motion PYQ, RRB ALP Force and Laws of Motion PYQ, or RRB Technician Force and Laws of Motion PYQ, practice these questions regularly to strengthen your Railway Physics preparation.
141
Which principle explains a rocket's operation in space?
RRB Group D
01/10/2018 / Shift-II
2018
✓ Answer:AConservation of momentum
A rocket gains momentum in the opposite direction to its expelled gases.
142
What is the momentum of a 50 kg body moving at 20 m/s?
RRB Group D
12/11/2018 / Shift-III
2018
✓ Answer:D1000 kg·m/s
p = mv = 50 × 20 = 1000 kg·m/s.
143
A shell explodes and its pieces fly in different directions. What is conserved?
RRB Group D
17/09/2018 / Shift-III
2018
✓ Answer:DMomentum
The total momentum of the fragments equals the shell's initial momentum when external impulse is negligible.
144
If the speed of a moving object is doubled, ______.
RRB Group D
05/12/2018 / Shift-I
2018
✓ Answer:CIts momentum doubles.
For constant mass, momentum is directly proportional to velocity, so its magnitude doubles.
145
A 30 g bullet is fired horizontally at 150 m/s from a 2 kg pistol. Find the pistol's recoil velocity.
RRB Group D; RRB Group D
05/10/2018 / Shift-III; 08/10/2018 / Shift-I
2018
✓ Answer:A−2.25 m/s
V = −mv/M = −0.03 × 150/2 = −2.25 m/s.
146
An object's momentum depends on ______.
RRB Group D
04/10/2018 / Shift-II
2018
✓ Answer:CBoth its mass and velocity
p = mv.
147
A 5 kg gun fires a bullet of mass 0.01 kg at 250 m/s. Find the recoil velocity of the gun.
RRB JE
14/12/2014
2014
✓ Answer:A−0.50 m/s
V = −mv/M = −0.01 × 250/5 = −0.50 m/s. A shift is not provided or is cropped in the supplied scan; the available date is retained.
✓ Answer:CProduct of force and the time for which it acts
For a constant force, impulse J = FΔt. It equals the change in momentum.
149
Momentum is expressed as the product of ______.
RRB ALP & Technician
09/08/2018 / Shift-I
2018
✓ Answer:CMass and velocity
Momentum equals mass times velocity.
150
A 2 kg ball moving at 5 m/s collides with a stationary 4 kg body. What are their velocities after collision?
RRB Group D
26/11/2018 / Shift-III
2018
✓ Answer:C1.66 and 3.33 m/s
The source selects C but omits the collision type and a sign. For a one-dimensional elastic collision, v₁ = −5/3 m/s and v₂ = 10/3 m/s, so the speed magnitudes are about 1.66 and 3.33 m/s.
Showing 141 – 150 of 267 MCQ Questions | Page 15 of 27
Start practicing Force and Laws of Motion RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
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